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The article presents abstracts of contributed papers submitted for presentation at the Chicago Meeting. The paper "Computer Simulation in a Missile Operational Cycle," by Robert T. Morrison explains a model of a hypothetical weapon system is analyzed by simulation techniques using a digital computer. All the important parameters affecting the model are identified and values selected. Random numbers selected by the computer are used to determine the occurrence of missile and GSE malfunctions according to the failure rates established and also to determine the repair times for the missiles and GSE if malfunctions occur. Another paper "A Measure of Effectiveness for Weapon-System Evaluation," by Robert T. Morrison explains a concept for a measure of effectiveness is developed for evaluating and judging weapon-system design and operation The proposed measure of effectiveness considers the most important factors in any complex system-maximum performance and reliability with minimum cost and time This paper shows how the measure of effectiveness is valuable for system analysis in judging between alternative proposed systems in preliminary design and measuring and evaluating the selected system progress from prototype design through final system operation and maintenance.

The article presents abstracts of contributed papers submitted for presentation at the Chicago Meeting. "Some Recent Contributions to the Lanchester Theory of Combat," by Ralph E. Bach, Laislav Dolansky and Harlod L. Stubbs explains that since the original formulation of Lanchester's equations pertaining to the combat of two opposing forces, the theory has been extended, organized and applied by many scientists. Certain more recent extensions of this theory, which have been developed under Project Numerics, will be described in this paper. Another paper "Single-Shot Kill Probability As a Measure of Bombing Effectiveness," by Albert M. Johnson and Vincent A. Ciminera points out advantages of using single-shot kill probability as a measure of bombing effectiveness in evaluating weapon systems. Historically the circular probable error has been employed for this purpose. However, with compressed reaction tunes made possible by future systems and the large effective yields of nuclear weapons, it is more desirable to be able to predict the probability that a single bomb will impact within a lethal distance of its intended target. The computation of this statistic, the single shot kill probability, is accomplished for values of the lethal radius and parameters of the distribution which characterize the bombing system.

The article presents abstracts for invited papers that are to published in the periodical. The article "An Experimental Test of the Bowley Bilateral Monopoly Model," by Laurence E. Fouraker and Sidney Siegel explains that scholar A.L. Bowley's price leadership models yield specific price-quantity solutions for the bilateral monopoly situation These solutions do not coincide with those derived from models of bilateral monopoly behavior conducted under different circumstances. An experimental representation of the Bowley conditions was developed. In another article "Bargaining "Face". Some Experiments in Bargaining Behavior," by Morton Deutsch the nature of bargaining situations is discussed. Two general propositions about conditions affecting the likelihood of a bargaining agreement are presented The role of "social face" in determining bargaining behavior is considered. The thesis is advanced that the latent content of much bargaining centers about "social face." The relationship between the use of threat and social face is analyzed. Results of some experimental studies of the effect of thread upon interpersonal bargaining are presented.

Presents news items related to events concerning various operations research societies as of September 02, 1961. Composition of the board of Netherlands Operations Research Society; Officers elected for the 1961-62 season for The Philadelphia Section of the Operations Research Society of America (ORSA); Second annual meeting of the northwest section of ORSA held in Seattle, Washington on August 4, 1961.